/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.ignite.internal.sql.engine.exec.row;

import java.util.Objects;

/**
 * Base class for types of fields of {@link RowSchema}.
 */
public abstract class TypeSpec {

    private final boolean nullable;

    /** Constructor. */
    public TypeSpec(boolean nullable) {
        this.nullable = nullable;
    }

    /** Returns {@code true} if values of this type can be {@code null}. */
    public boolean isNullable() {
        return nullable;
    }

    /** {@inheritDoc} */
    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        TypeSpec typeSpec = (TypeSpec) o;
        return nullable == typeSpec.nullable;
    }

    /** {@inheritDoc} */
    @Override
    public int hashCode() {
        return Objects.hash(nullable);
    }
}
